Benign tumour of submandibular glands is rare, however amongst those which happen, pleomorphic adenoma (PA) is the most common type. Although it has been reported in several case reports, giant PA is extremely uncommon. These tumours are usually painless and slow growing but when neglected on some occasions, the long-standing size and weight can augment surgical excision. An unusual case of a giant submandibular PA in a 46-year-old male patient was reported and discussed here. Patient usually tend not to seek out for medical treatment till it became gigantic. Neglecting such tumors can cause unsightful appearance due to the gigantic mass and in a worse case scenario may even cause airway obstruction if it continues to enlarge.Keywords: Pleomorphic adenoma, submandibular gland neoplasm, neck neoplasm.